Hi Joe,
The microwave's bottom light bulb has 40 watts.
If you have further questions or inquiries, these are the platforms on which you can reach us:
1. Facebook Messenger: http://m.me/samsungsupport
2. Twitter: https://twitter.com/messages/compose?recipient_id=18768513
3. Samsung Community: https://us.commuity.samsung.com/t5/Samsung-Community/ct-p/us
4. Samsung Customer Care: 1-800-7267864 (1800-SAMSUNG)
Please provide us with this reference number (1147512389) to help our team pull up your information when you message us.
Thank you.
-Kimberly